Patricia Johnson made an investment of $18,215.82. From this investment, she will receive $2,000 annually for the next 15 years starting one year from now. Click here to view the factor table. (For calculation purposes, use 5 decimal places as displayed in the factor table provided.) What rate of interest will Patricia's investment be earning for her? (Hint: Use Table 4.) (Round answer to 0 decimal places, e.g. 25\%.)